That's a mighty great thing you guys are doing there. You _claim_ that it's DRM free and that you get it for buying it on the humble website. _No where_ does it says you have to have a steam key to play thething. No where. but when you go to it, oh sorry you have to have a steam key? What kind of dirty backhanded trick is this?

Non-Steam users: here you can activate your extra maps on your Days of Wonder account, and enjoy them on your Android device and/or your DRM-free game. This is accomplished in this page by using the Steam keys that you received in your Humble Bundle - but without installing Steam!

Steam users: you don't need to do this - you should use your Steam keys directly in Steam instead. This will also unlock the map(s) on your Android device. Just make sure you use the same Days of Wonder account everywhere, of course.